#include <stdio.h>

int main(int argc, char *argv[])
{
    enum sex {woman, man, between} student;

    student = between;
    
    switch (student) {
        case woman:
           printf("it's she.\n");
            break;
        case man:
            printf("it's he.\n");
            break;
        case between:
            printf("it's she, but used to be a man.\n");
            break;
        default:
           printf("not know yet"); 
    }

    return 0;
}
